This mesonoxian message is copacetic to my brief absquatulate. I shall restitute my attendance of this assemblage of camaraderie within this nychthemeron yclept Wednesday. Hopefully this epistle has not been an enigma, and you have not made a floccinaucinihilipilification of it.

It is basically saying, "good night, I'll see you tomorrow. I hope you didn't find this neither confusing, nor useless." Is it grammatically correct?

my sister wrote:[the sun] can go to Hell and brighten that place up a while.

I couldn't really find much information on those words. I had to look up a few examples on how to use some of them. But the main purpose here was to create an enigma; clarity not a goal. Precision; not so much a goal, so long as someone could figure it out.

my sister wrote:[the sun] can go to Hell and brighten that place up a while.